X-RAY-DIFFRACTION STUDY OF SULFUR TO 32 GPA - AMORPHIZATION AT 25 GPA

被引：66

作者：

LUO, H

RUOFF, AL

机构：

[1] Department of Materials Science and Engineering, Cornell University, Ithaca

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.48.569

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The orthorhombic form of sulfur (S8) has been studied in a diamond anvil cell to 32 GPa at room temperature by energy-dispersive x-ray-diffraction techniques using a synchrotron source. An orthorhombic-to-monoclinic phase transition was observed at about 5 GPa. The monoclinic phase could be followed until 24 GPa. Our previous optical results indicted a phase transition around this pressure. The diffraction patterns above 25 GPa showed the characteristics of an amorphous phase. This crystalline-amorphous phase change was found to be reversible with hysteresis upon decreasing pressure. The mechanism of this pressure-induced amorphization of sulfur is proposed. The equation of state was determined to 24 GPa.

引用

页码：569 / 572

页数：4

共 22 条

[1] ENERGY DISPERSIVE-X-RAY DIFFRACTION FROM HIGH-PRESSURE POLYCRYSTALLINE SPECIMENS USING SYNCHROTRON RADIATION [J].